Turquoise
Turquoise, CuAl6(PO4)4(OH)8·4H2O
mineral
Category
Mineral (Man Made Glass)
Browse mineral (man made glass) specimens identified by the Rock Identifier community.
Learn about Mineral (Man Made Glass) in the encyclopedia
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Chert (often called Flint in archaeological contexts)
Silicon Dioxide (SiO2)
sedimentary
Chert (Flint)
SiO2 (Microcrystalline Quartz)
sedimentary
Chert / Flint
Silicon Dioxide (SiO₂)
sedimentary
Chert Arrowhead
Chert (Cryptocrystalline variety of Quartz, SiO2)
sedimentary
Chert (specifically Flint or Nodular Chert)
Silicon dioxide (SiO2)
sedimentary
Banded Chert
Microcrystalline Quartz (SiO2)
sedimentary
Granite
Granite (Phaneritic igneous rock)
igneous
Diamond (in Jewelry Setting)
Carbon (C)
gemstone
Chert / Flint
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Granodiorite
Phaneritic Plutonic Intermediate-Felsic Rock
igneous
Granite
Phaneritic Igneous Rock (composed primarily of Quartz, Alkali Feldspar, and Plagioclase)
igneous
Diamond
Cubic carbon (C)
mineral
Cardstock (Paper)
Cellulose (C6H10O5)n
sedimentary (man-made)
Likely iron-rich rock or weathered metallic mineral fragment
Uncertain; possibly limonite/goethite or iron-bearing slag
mineral
Red coral (likely precious coral)
Corallium sp.; calcium-carbonate skeleton, primarily calcite
gemstone
Banded Chert (River Stone)
Silicon Dioxide (SiO2)
sedimentary
Chert / Flint
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Chert (Yellow Jasper variant)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Flinty variety)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Asphalt (Bituminous Concrete)
Bituminous Concrete / Pavement
man-made (synthetic rock)
Loose faceted colorless gemstones, likely quartz or glass-like mineral chips
Most consistent with quartz (SiO₂), though the photograph cannot exclude synthetic cubic zirconia or glass
gemstone
Chert (Nodule/Pebble)
Chert (Silicon Dioxide, SiO2)
sedimentary
Chert (Yellow Jasper/Flint pebble)
Microcrystalline Quartz (SiO2)
sedimentary
Crinoid stem fossil
Crinoidea
fossil
Sandstone
Arenite (composed primarily of SiO2)
sedimentary
Quartz (Engineered Quartz Surface)
Silicon Dioxide (SiO2) based composite
mineral (man-made composite)
Chert (often called Flint)
Chert (Cryptocrystalline Quartz, SiO2)
sedimentary
Sea Glass (Uranium/Vaseline Glass variant)
Silicon Dioxide (SiO2) with trace Uranium Oxide (U3O8)
man-made silicate (anthropogenic glass)
Fossilized gastropod (likely nerite or related sea snail)
Gastropoda; shell composed originally of aragonite/calcite, commonly replaced or infilled by calcite
fossil
Chert (varieties: Flint or Jasper)
Silicon dioxide (SiO2) / Microcrystalline Quartz
sedimentary
Sea Glass (Kelly Green)
Amorphous Silica (Silicon Dioxide with Iron/Chromium additives)
Anthropogenic specimen (Man-made material)
Seven Chakra Bonded Stone
Bonded composite of Red Jasper, Carnelian, Tiger's Eye, Aventurine, Lapis Lazuli, Amethyst, and Clear Quartz
metamorphic
Faceted glass-like gemstone object
Likely synthetic glass or cubic zirconia; exact material cannot be confirmed from the image
gemstone
Chert (Flint Arrowhead)
Silicon Dioxide (SiO2)
sedimentary
Chert (Flint)
Silicon Dioxide (SiO2)
sedimentary
Chert (Flint)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Chert (varietal Chalcedony or Flint)
Silicon dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Chert (Jasper/Flint variant)
Silicon Dioxide (SiO2)
sedimentary
Natural Pearl
Calcium carbonate (primarily Aragonite and Conchiolin), CaCO3
mineral
Unidentified gray metallic object
Not determinable from the image; likely a metal screw or manufactured fastener rather than geological material
mineral